Ratchet adapter for a drill chuck



FIG. 1 is a rear and left-side perspective view of a ratchet adapter for a drill chuck showing my new design, the broken lines being for environmental purposes only and forming no part of the claimed design;

FIG. 2 is a left side elevational view;

FIG. 3 is a front elevational view thereof on an enlarged scale;

FIG. 4 is a rear elevational view thereof on an enlarged scale; and,

FIG. 5 is a right side view elevational view thereof. 

The ornamental design for a ratchet adapter for a drill chuck, as shown and described. 